Improvement in apparatus for expressing liquid from spent tan-bark



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L. BR EVAL.

' Apparatus for Expressing-Liquid from Spent Tan-Bark. No. 135,317. 'Pate tedlan.28,l873.

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Apparatus for Expressing Liquid from Spent Tan-Bark.

No. 135,317, PatentedJan-28,1873.

AM, Puoro-mwommla no N. X(0sa mar/5's moms) UNITED. STATES PATENT LAURENT BREVAL, OF rains, FRANCE.

Specification forming part of Letters Patent No. 135,317, dated January 28, 1873.

. To all whom it may concern:

Be it known that I, LAURENT BREVAL, of Paris, France, have invented a new and useful Press for the Extraction of a Liquid from Spent Tan-Bark or other like matter; and do hereby declare the same to be fully described in the following specification and represented in the accompanying drawing, of which Figure l is a front elevation, and Fig. 2 a vertical section of such press. Fig. 3 is a section, on an enlarged scale, of the deliveryroller, the straining-bar, and the compressingrollcrs, to be hereinafter described. Fig. 4 is a top view of the deliveryroller, the straining-bar, and the lower or smooth compressingroller.

By means of the said press spent tan-bark or wet sawdust may be deprived of liquid, so as to be'capable of being used as fuel. The press may also be used for the extraction of juice from sugar-cane or various other vegeta ble matters.

Y The nature of my invention consists in the arrangement and combination, substantially as hereinafter described, of a fluted deliveryroller, aperfora ted or foraminous curved straining-bar, and two compressive cylinders, one

being fluted and the other plain on its cylindrical surface or periphery; such devices being provided with a hopper and inclined plane and certain other adjuncts, all substantially as hereinafter explained, and as represented in the accompanying drawing.

Such drawing exhibits the press as having the channeled cylinder or pressure-roller U arranged directly over the smooth-faced pressure-roller B also, as having the fluted delivery or feed roller A arranged in rear of the bite of the said two pressurc-rollers. The perforated bar D is disposed concentrically with the upper pressure-roller O, or thereabout, and

between the delivery-roller A and the lower pressure-roller B, all being as shown. A hopper, T, formed and arranged with the delivery and pressure rollers, in manner as represented, serves to receive the wet spent tan-bark and convey it to the bite of the rollers A G. The channels of the deliveryroller I prefer to make helicoidal or to arrange in long helices, as shown inFig. 4. The bar D is pierced with numerous fine and conical holes, each having its larger diameter at bottom of the hole in order that the hole, while the machine may be in operation, may not become clogged with bark. The said bar D, at its ends, should be suitably supported, and be provided with adjustments to enable it to be readily fitted closely to the periphery of the delivery or feed roller A. The cylinder B has flanges b b at its ends to admit or regulate the width of the sheet of pressed material discharged from it. Furthermore, the cylinder (3 has its journals supported in boxes arranged to slide vertically in guides within the frame H, by which the main operative parts are supported. Levers M M, by means of rods 0 serve to press downward the said boxes, such levers, by rods 0', being connected with other levers, S, arranged as shown, and having weights T suspended from them by rods R R. Underneath the rollers B G is a receiving trough or pan, G, provided with an educt, g, to lead into a drain or conduit, or other proper receptacle, arranged belowsuch educt. For imparting motion to the cylinder 0 there is fixed upon its shaft a spur-gear, G which engages with a pinion, O fixed upon a horizontal shaft, d. The said pinion engages with a like gear, b, fixed on a shaft, 0. A similar gear fixed on the shaft 0 engages with aspur-gear, B fixed upon the shaft of the roller B. Furthermore, on-tl1e shaft 6 is a gear, f, which engages with a pinion, g, fixed on a driving-shaft, h, ar-

ranged as represented, and provided with a fiy-wheel, V, and fast and loose pulleys P P. An inclined plane, J, fitted to the frame II, and nearly resting on the roller B, is arranged as shown, the purpose of it being to discharge from the machine the pressed material or tanbark.

In using the said machine, while its press Lire-cylinders may be in revolution the material to be pressed is to be thrown into the hop per, from whence it will be delivered between the two rollers A and O, and there receive its first pressure, the liquid extracted flowing upon the foraminous or perforated bar D, over and against whose surface the material will be forced by the roller 0. Finally, the mate rial will pass between the rollers B and C, and

by them be still further compressed, the liquid expressed being received upon the perforated bar, and caused to run through such into the receiver G. Gears m y, fixed on the shafts of OFFICE.

the rollers A O, impart motion to the feedroller A.

What I claim as my invention, in the machine as described, is-

The combination of the rollers or cylinders A B C and the perforated bar D, arranged as set forth, the rollers B 0 being provided with mechanism for revolving them, as specified and the upper of said rollers B 0 being movable vertically and furnished with pressure devices, essentially as described, and the system of rollers A B C and perforated bar D being provided with a hopper, T, a liquid-re ceiver, G, and an inclined discharger or plane, J, or one or more of such, as occasion may require, the whole being substantially as and for the purpose as explained.

In witness whereof I, the said LAURENT BREVAL, have -hereto set my signature this 7th day of October, 1872.

L. BREVAL.

\Vitnesses:

F. ()LCOTT, A. J. DE SYR. 

